Journal of the Chemical Society - Faraday Transactions p. 3301 - 3306 (1993)
Update date:2022-08-11
Topics:
Marchal, C.
Davidson, A.
Thouvenot, R.
Herve, G.
The preparation, characterization and catalytic properties of acids with the general formula H4PMo(11-x)WxVO40, x = 0-6, and their pyridinium salts are described.The (31)P NMR spectra reveal that the solids synthesized are mixtures of species with different x values.Three distinct stoichiometric ratios of W : Mo (1 : 10, 2 : 9, 3 : 8) have been used to vary the proportion of each species in these solids (labelled y = 1, 2 and 3).Their thermal stabilities and redox properties in solution are close to those of pure H4PMo11VO40.Their Broensted acidity increases in the order y = 1 < y = 2 < y = 3.Their catalytic properties for the oxydehydrogenation of isobutyric acid methacrylic acid are modified drastically.An important decrease in oxidative activity and an increase in acid activity are observed even with small amounts of tungsten.Tungsten may modify either the electronic transfer between the Keggin units or the oxygen lability.
View Morewebsite:http://www.simagchem.com
Contact:+86-592-2680277
Address:21/F Hualong Office Building,No.6 Hubin East Road, Xiamen,China
Shanghai Yuanye Bio-Technology Co., Ltd.
website:http://www.shyuanye.com
Contact:+86-21-61845781
Address:Building 6, No. 465, Changta Road,Songjiang District,Shanghai,China
SHENZHEN PENGCHENG REDSTAR INDUSTRY CO.,LTD
Contact:+86-755-82412922
Address:Room 8066, East Block, Square City, Jiabin Road, Luohu District
Tianjin Tensing Fine Chemical Research Develop Centre
Contact:86-022-23718576,13032267585
Address:2-2-201,13 Guiyuan road,Huayuan Industry district,Tianjin,china
Nanjing Chemical Material Corp.(NCMC)
website:http://www.njchemm.com
Contact:0086-25-83172879
Address:B12 Technology and Innovation Building, Nanjing Tech University, No.5 New Model Road
Doi:10.1039/c3gc42049c
(2014)Doi:10.1021/jo701957t
(2007)Doi:10.1007/BF02154248
(1971)Doi:10.1016/j.bmcl.2015.07.102
(2015)Doi:10.1592/phco.21.7.661.34580
()Doi:10.1021/acs.joc.9b02141
(2019)
